CN103676729B - Digital knob switch multiplexing device and adopt the electronics of described device - Google Patents
Digital knob switch multiplexing device and adopt the electronics of described device Download PDFInfo
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- CN103676729B CN103676729B CN201310620011.5A CN201310620011A CN103676729B CN 103676729 B CN103676729 B CN 103676729B CN 201310620011 A CN201310620011 A CN 201310620011A CN 103676729 B CN103676729 B CN 103676729B
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Abstract
The present invention discloses a kind of digital knob switch multiplexing device and adopts the electronics of described device, comprises the power supply of the different amplitude of multichannel, digital knob switch and treater; The power supply of the different amplitude of described multichannel selects a wherein road power supply to be that digital knob switch is powered by gating device, and described treater judges the controlled plant of current selected according to the power supply size of digital knob switch. The amplitude of the power supply that the present invention exports digital knob switch to by changing, realize the automatic identification to the controlled plant currently regulated, thus make multiple controlled plant can share a digital twist switch and carry out parameter regulation, it is applied in and is needed in electronics that multiple controlled plant is regulated step by step, it is possible not only to the circuit structure simplifying electronics, reduce hardware cost, and the two-way interface resource only needing to take treater can complete the adjustment task to multiple controlled plant, greatly simplify the design difficulty of circuit system.
Description
Technical field
The invention belongs to twist switch technical field, specifically, relate to a kind of circuit structure for digital knob switch designs and the electronics adopting this digital knob switch circuit to design.
Background technology
Digital knob switch is a kind of manual switch by regulating the turned position of knob the working order of electronics to be operated, it is widely used on the electronics of a lot of type at present, such as: can be applied on the audio output apparatus such as sound equipment, receiving set, interphone, for regulating the volume of microphone or loud speaker; It is applied on the set lights such as desk lamp, torch light, it is possible to realize the effective adjustment to brightness of illumination; It is applied on some display equipment, it is possible to realize the manual regulation to picture brightness; Etc..
This kind adopts digital knob Switch Controller controlled plant (such as volume, brightness etc.) to carry out multistage adjustment or the control mode regulated continuously, it is in circuit structure design, it is all be adopted as each controlled plant to configure a twist switch at present, and the mode taking the two-way GPIO mouth of treater designs, by detecting the phase differential of its two-way GPIO mouth, treater identifies that knob rotates forward or reversion, thus realize the manual regulation to controlled plants such as volume, intensity of illumination, picture brightness.
Obviously, this kind of conventional needle is to the pilot circuit of numeral twist switch design, when being applied on some electronics self just requiring regulate multiple (representing by N kind below) controlled plant, just need in this class of electronic devices, configure N twist switch, and need the 2N road GPIO mouth taking treater in electronics, complete to wait N kind to adjust the detecting applied and parameter regulation. This not only can cause the rising of electronics hardware cost, the increase of volume, and needs a large amount of interface resources taking treater, and this, for some interface resource treater relatively in short supply, can increase the design difficulty of circuit system undoubtedly.
Summary of the invention
The present invention is in order to solve the existing pilot circuit for digital knob switch designs, a twist switch can only regulate a controlled plant, function singleness, the problem that resource occupation amount is big, propose a kind of digital knob switch multiplexing device, achieve multiple controlled plant to the multiplexing of a digital knob switch, circuit layout is simple, provide significant conservation resource.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of digital knob switch multiplexing device, comprises the power supply of the different amplitude of multichannel, digital knob switch and treater; The power supply of the different amplitude of described multichannel selects a wherein road power supply to be that digital knob switch is powered by gating device, and described treater judges the controlled plant of current selected according to the power supply size of digital knob switch.
Further, described treater connects sense terminal and the state end of numeral twist switch, being selected wherein after a road power supply and before digital knob switch rotates by gating device, treater, by the voltage magnitude of the described sense terminal of detection or state end, judges the controlled plant of current selected.
Preferably, the ADC interface of the state end connection handling device of described digital knob switch, the GPIO mouth of sense terminal connection handling device; Treater judges the controlled plant of current selected by the magnitude of voltage that detection its ADC interface conversion exports, and by detecting the high low level state of GPIO mouth described in it, judges whether digital knob switch rotates.
Further again, described treater, according to the phase differential between the state end of digital knob switch and sense terminal, judges the turning direction of digital knob switch, and then regulates the parameter value of controlled plant to increase or reduce according to turning direction.
In order to simplify circuit layout, comprising the highest direct supply of a road voltage magnitude at described power supply, all the other each road power supplies generate via the conversion of dividing potential drop circuit dividing potential drop by the direct supply that this road voltage magnitude is the highest.
Further, each road power supply generated by the conversion of described dividing potential drop circuit dividing potential drop exports the power supply end of digital knob switch separately to via a road anti-back flow circuit.
When described controlled plant is two kinds, described gating device can adopt a keyswitch to carry out circuit layout, is connected to by described keyswitch between the highest direct supply of described voltage magnitude and the power supply end of digital knob switch; Described dividing potential drop circuit is connected between the highest direct supply of voltage magnitude and ground, and dividing potential drop node connects the power supply end of described digital knob switch.
When described controlled plant be two kinds or two or more time, described gating device can adopt a single pole multiple throw to carry out circuit layout, the public end of described single pole multiple throw is connected the highest direct supply of described voltage magnitude, wherein a road gating end directly connects the power supply end of described digital knob switch, each road gating end is each via a component pressure circuit ground in addition, and the dividing potential drop node on each component piezoelectricity road connects the power supply end of described digital knob switch separately; Or described dividing potential drop circuit is the circuit that a road has multiple dividing potential drop node, one end connects the highest direct supply of described voltage magnitude, the other end ground connection, the public end of described single pole multiple throw connects the power supply end of described digital knob switch, each road gating end correspondingly gating connect each dividing potential drop node.
Preferably, the direct supply that described voltage magnitude is the highest passes through filter capacitor ground connection, to improve the stability of described direct supply.
Based on above-mentioned digital knob switch multiplexing device, the invention allows for a kind of electronics adopting described digital knob switch multiplexing apparatus design, comprise the power supply of the different amplitude of multichannel, digital knob switch and treater; The power supply of the different amplitude of described multichannel selects a wherein road power supply to be that digital knob switch is powered by gating device, and described treater judges the controlled plant of current selected according to the power supply size of digital knob switch.Thus, only need to use a digital twist switch can meet the parameter regulation demand of multiple controlled plant.
Compared with prior art, advantage and the positively effect of the present invention be: the amplitude of the power supply that the present invention exports digital knob switch to by changing, realize the automatic identification to the controlled plant currently regulated, thus make multiple controlled plant can share a digital twist switch and carry out parameter regulation, it is applied in and is needed in electronics that multiple controlled plant is regulated step by step, it is possible not only to the circuit structure simplifying electronics, reduce hardware cost, save the space of electronics; And the two-way interface resource only needing to take treater in circuit layout can complete the adjustment task to multiple controlled plant, significantly saving on the basis of treater interface resource, what simplify PCB walks line design, especially it is applicable to being applied in the interface resource of treater system circuit design relatively in short supply, with the difficulty of simplified system circuit layout.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the schematic circuit diagram of a kind of embodiment of digital knob switch multiplexing device proposed by the invention;
Fig. 2 is the schematic circuit diagram of another embodiment of digital knob switch multiplexing device proposed by the invention;
Fig. 3 is the schematic circuit diagram of another embodiment of digital knob switch multiplexing device proposed by the invention;
When Fig. 4 is the right-hand rotation of digital knob switch, the level change sequential chart of A, B two ports;
When Fig. 5 is the left-hand rotation of digital knob switch, the level change sequential chart of A, B two ports.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
The digital knob switch multiplexing device of the present embodiment is in order to realize the compatible adjustment of digital knob Switch Controller N kind controlled plant (such as volume, brightness etc.), first in circuit layout, for digital knob switch provides the power supply of the different amplitude of multichannel, the corresponding controlled plant of each road power supply. Utilizing gating device to carry out selecting switching between described each road power supply, currently need the controlled plant regulated according to user, the road power supply that gating is corresponding with it is that digital knob switch is powered. Then, treater detection is utilized to be applied to the power supply of digital knob switch, according to the power supply size detected out, which controlled plant what just can identify current needs adjustment is, and then the sense of rotation according to digital knob switch, carry out regulating step by step or continuously to the parameter of this controlled plant.
For described multiple-way supply power supply, be described for N road, described N be greater than 1 natural number, the direct supply of N road independence both can have been adopted directly to provide; Can also adopt and the power panel in digital knob switch multiplexing device arranges N-1 road voltage stabilizing chip, utilize voltage stabilizing chip that the wherein road direct supply in device is carried out voltage stabilizing conversion, to generate the different power supply of all the other required N-1 road voltage magnitudes. For former design, it is only applicable to the situation that namely device self has possessed multi-channel dc power supply, the direct supply utilizing each road existing is directly for digital knob switch is powered, it circuit layout is obviously most simple economy, but, the electronics that can simultaneously provide multi-channel DC to power at present is rare after all, and therefore its suitable application area is more limited. Only there is a road or during less than N road direct supply for device self, according to a kind of design after above-mentioned, the rising of whole circuit cost can be caused undoubtedly, the increase of pcb board area occupied.In order to address this problem, the present embodiment proposes to adopt the mode of design dividing potential drop circuit, dividing potential drop circuit described in selecting arrangement Zhong No. mono-direct supply VDD connection, utilize dividing potential drop circuit that this road direct supply VDD is carried out dividing potential drop conversion, and then generate remaining N-1 road power supply, to meet design requirement.
Obviously, the each road power supply exported by the conversion of dividing potential drop circuit, its amplitude is certainly lower than described direct supply VDD, as long as dividing potential drop circuit is reasonably configured, make the voltage magnitude of its N-1 road power supply exported different, and each road power supply can meet the power requirement of digital knob switch, so coordinate direct supply VDD, namely can be the power supply that digital knob switch provides the different amplitude in N road, meeting under the prerequisite that N kind controlled plant is accurately identified, the overall circuit structure of simplification device. Dividing potential drop circuit can be in series by resistance, it is also possible to is in series by resistance and voltage stabilizing tube. The node of series connection is dividing potential drop output terminal, exports the power supply of respective magnitudes.
Concrete assembling structure and the principle of work thereof of two kinds of digital knob switch multiplexing circuit is set forth respectively below in conjunction with Fig. 1 to Fig. 3.
Shown in Figure 1, for controlled plant only two in the case of (N=2), it is possible to adopt a keyswitch S2 as described gating device, be connected between the power supply end VCC of direct supply VDD and digital knob switch DS. The design philosophy proposed according to the present embodiment, two controlled plants need duplex feeding power supply to identify, using a road direct supply VDD existing in device as a wherein road power supply, so only need design one component piezoelectricity road that described direct supply VDD is carried out dividing potential drop conversion, two-way power supply power supply can be generated, meet design requirement.
Based on this, the present embodiment adopts two points of compressive resistances R1, R2 to be connected to form described dividing potential drop circuit, is connected between described direct supply VDD and ground, direct supply VDD is carried out dividing potential drop conversion. The dividing potential drop node (namely dividing the middle node of compressive resistance R1, R2) of dividing potential drop circuit is connected an anti-anode pouring in down a chimney diode D1, the anti-negative electrode pouring in down a chimney diode D1 connects the power supply end VCC of numeral twist switch DS, No. two direct supply VDD1 is exported, for digital knob switch DS powers by the dividing potential drop node of dividing potential drop circuit. The system ground of the ground terminal GND connecting PCB board of digital knob switch DS. Prevent that pouring in down a chimney diode D1 mainly prevents voltage from pouring in down a chimney, stablize the input of the power supply end VCC of digital knob switch DS, therefore the present embodiment is not limited to the anti-anti-back flow circuit pouring in down a chimney diode D1 and being formed, can substituting as long as the anti-anti-back flow circuit pouring in down a chimney effect can be played, such as the anti-anti-back flow circuit pouring in down a chimney diode D1 formation can replace the anti-back flow circuit into triode and/or MOS pipe etc. are formed.
Stable in order to make to export to each road direct supply VDD, VDD1 of digital knob switch DS, the present embodiment is also connected with filter capacitor C1 between described direct supply VDD and ground, with filtering for the noise interference in electric line.
By digital knob switch DS connection handling device MCU, detected the power supply size of digital knob switch DS by processor MCU, and then realize the identification to current selected controlled plant. In the present embodiment, described processor MCU can select the micro-chip of a low cost to carry out the specific design of circuit, to reduce the hardware cost of complete machine. In order to save the interface resource of processor MCU further, for the power supply size being applied to digital knob switch DS, the present embodiment preferably adopts the method compatibility of the high level amplitude of the state end A or sense terminal B by detecting digital knob switch DS to realize.Due to the rotary state of digital knob switch DS, need to realize by detecting the phase change of its state end A and sense terminal B, and the signal exported by state end A and sense terminal B is high low level pulse signal, and the amplitude of high level just equals to be input to the voltage magnitude of power supply of digital knob switch DS. Therefore, when designing the connection line of digital knob switch DS and processor MCU, only need to take the two-way interface of processor MCU, connect the state end A and sense terminal B of numeral twist switch DS respectively, can while meeting numeral twist switch DS rotary state testing requirement, it is achieved to the detection of numeral twist switch DS power supply size.
In the present embodiment, it is preferred to use road GPIO mouth (such as interrupt signal interface INT) of processor MCU connects the sense terminal B of numeral twist switch DS, judges whether digital knob switch DS rotates according to the high low level state of sense terminal B; The one road ADC interface of selection processor MCU connects the state end A of numeral twist switch DS, according to the high level amplitude size of state end A, judges the controlled plant currently chosen.
The concrete principle of work of the digital knob switch multiplexing device proposed by the present embodiment below in conjunction with Fig. 1 is described in detail.
Assume that certain electronics needs to carry out regulating step by step or continuously to loud speaker volume and picture brightness two controlled plants, and when select direct supply VDD be digital knob switch DS power time, represent require regulate controlled plant be loud speaker volume; When select the direct supply VDD1 after dividing potential drop be digital knob switch DS power time, represent require regulate controlled plant be picture brightness.
When user needs the loud speaker volume to this electronics to regulate, closed keyswitch S2, it may also be useful to direct supply VDD is that digital knob switch DS powers. Owing to the voltage magnitude of direct supply VDD is higher than the voltage magnitude of the direct supply VDD1 after dividing potential drop, therefore prevents pouring in down a chimney the reverse-biased cut-off of diode D1, block the output of direct supply VDD1. Now, high level is exported respectively by the state end A of digital knob switch DS and sense terminal B, and amplitude equals the voltage magnitude of direct supply VDD. When the voltage magnitude of state end A that processor MCU detects digital knob switch DS by its ADC interface is VDD, judge that current controlled plant is loud speaker.
Afterwards, the volume of loud speaker can be regulated by rotary digital twist switch DS by user. When user rotates digital knob switch DS, the sense terminal B of digital knob switch DS can be at a time lower level by high level saltus step, and then sends a look-at-me to the interrupt signal interface INT of processor MCU, makes processor MCU enter interrupt routine. In interruption process, processor MCU continues the level change of the state end A of monitoring digital knob switch DS, if the current potential of state end A turns into high level from lower level, then representative digit twist switch DS turns right, shown in composition graphs 4, now processor MCU is increased by the volume of its internal processes control loudspeaker; If the current potential of state end A turns into lower level from high level, then representative digit twist switch DS turns left, and shown in composition graphs 5, now processor MCU is reduced by the volume of its internal processes control loudspeaker, thus realizes the adjustment to loud speaker volume.
When user needs the picture brightness to this electronics to regulate, lift keyswitch S2, cut off the direct power supply of direct supply VDD to digital knob switch DS, then use the direct supply VDD1 by exporting after dividing potential drop circuit dividing potential drop to power to digital knob switch DS.Now, processor MCU turns into VDD1 by detecting the voltage magnitude of its ADC interface from VDD, can accurately judge that the controlled plant that current needs regulate has turned into picture brightness.
Afterwards, the picture brightness that display screen on electronics shows just can be carried out free adjustment by rotary digital twist switch DS by user. Concrete regulate process is with the regulate process of above-mentioned loud speaker volume, and the present embodiment is not repeated.
Circuit assembling structure shown in Fig. 1 is only applicable to the situation that controlled plant is two, and for the electronics of controlled plant more than two, the present embodiment further provides circuit layout scheme as shown in Figure 2 and Figure 3.
For controlled plant more than two in the case of, the present embodiment selects a single pole multiple throw S3 to carry out the specific design of circuit as described gating device, and proposes two kinds of physical circuit set up the schemes:
The first, shown in Figure 2, the public end 1 of single pole multiple throw S3 is connected direct supply VDD, and by filter capacitor C2 ground connection, for the undesired signal in filtering direct supply VDD; A wherein road gating end 4 of single pole multiple throw S3 is connected to the power supply end VCC of digital knob switch DS, the system ground of the ground terminal GND connecting PCB board of described digital knob switch DS; By all the other each road gating ends 3,2 of single pole multiple throw S3 each via a road dividing potential drop circuit ground, each road dividing potential drop circuit all can adopt two points of compressive resistances to be formed by connecting, such as: adopt point compressive resistance R5, a R6 to be connected to form the first component piezoelectricity road, it is connected between the gating end 3 of single pole multiple throw S3 and system ground, its dividing potential drop node is by the anti-anti-back flow circuit pouring in down a chimney diode D2(or other assembling structures) connect the power supply end VCC of numeral twist switch DS, for digital knob switch DS provides two-way power supply power vd D2. With reason, point compressive resistance R3, a R4 is adopted to be connected to form the 2nd component piezoelectricity road, it is connected between the gating end 2 of single pole multiple throw S3 and system ground, its dividing potential drop node, by the anti-power supply end VCC pouring in down a chimney diode D3 and connecting numeral twist switch DS, is digital knob switch DS offer the 3rd road power supply VDD3. In circuit layout, as long as the resistance on two component piezoelectricity roads is carried out reasonable disposition, make the partial pressure value difference exported by two dividing potential drop nodes, the requirement of the direct current supply that the different amplitude of multichannel is provided to digital knob switch DS can be met.
Circuit structure shown in Fig. 2 uses single-pole triple-throw switch S 3 to coordinate two component piezoelectricity roads, it is possible to for digital knob switch DS provides three road power supply VDD, VDD2, VDD3, and then meets the adjustment requirement to three controlled plants. If the number of controlled plant is more, it is described for N number of controlled plant, then hilted broadsword N throw switch can be selected to coordinate N-1 component piezoelectricity road, generate the power supply of the different amplitude in N road, to meet the design requirements of circuit.
It two is adopt point compressive resistance series connection more than two, form the dividing potential drop circuit that a road has multiple dividing potential drop node. As shown in Figure 3, it is described for the dividing potential drop circuit selecting four points of compressive resistance R7-R10 series connection formation one tunnels to have three dividing potential drop nodes. One end of described dividing potential drop circuit is connected to direct supply VDD, the other end ground connection, three dividing potential drop nodes respectively three road gating ends 2,3,4 with described single pole multiple throw S4 connect one to one, the public end 1 of single pole multiple throw S4 is connected the power supply end VCC of described digital knob switch DS.Thus, when carrying out each road gating end of single pole multiple throw S4 selecting switching, owing to the voltage magnitude of power supply VDD4 or VDD5 that exported by the different dividing potential drop node of described dividing potential drop circuit or VDD6 is different, therefore can meet for digital knob switch DS provides different power supply, for the design requirements identifying controlled plant type.
Circuit set up the scheme shown in Fig. 3 can meet controlled plant when being three, the multistage adjustment of each object parameters value. Certainly, for controlled plant more than three in the case of, only need to select the dividing potential drop circuit described in more point of compressive resistance series connection formation, the multi channel selecting end of more dividing potential drop node and single pole multiple throw S4 is provided to connect one to one, just can be the power supply that digital knob switch DS provides more different amplitudes, to meet the identification requirement to more controlled plants, the present embodiment is not limited in above citing.
Composition graphs 2, the concrete principle of work of the digital knob switch multiplexing device adopting single pole multiple throw design is described in detail by the present embodiment for three controlled plants. Assume that three controlled plants are respectively loud speaker volume, earpiece volume and picture brightness.
When user needs the loud speaker on electronics is carried out volume adjusting, first single pole multiple throw S3 is switched to gating end 4 so that it is public end 1 is connected with gating end 4, utilizes direct supply VDD to power directly to digital knob switch DS. Now, processor MCU detects that the level magnitude of the state end A of digital knob switch DS is VDD, thus judges that the current controlled plant needing adjustment is loud speaker. Afterwards, processor MCU, by the phase change of the state end A and sense terminal B of detection digital knob switch DS, can identify the turning direction of digital knob switch DS, and then become big by internal processes control loudspeaker volume or reduce.
When user needs the microphone on electronics is carried out volume adjusting, single pole multiple throw S3 can be switched to gating end 3, its public end 1 is connected with gating end 3, and the direct supply VDD2 exported after utilizing point compressive resistance R5, R6 dividing potential drop powers to digital knob switch DS. Now, processor MCU detects that the level magnitude of the state end A of digital knob switch DS turns into VDD2, thus just judges that the current controlled plant needing adjustment is microphone. Afterwards, user, by rotating digital knob switch DS, can realize the free adjustment to microphone volume.
With reason, when user needs the picture brightness to electronics to regulate, only single pole multiple throw S3 need to being switched to gating end 2 so that it is public end 1 is connected with gating end 2, the direct supply VDD3 exported after utilizing point compressive resistance R3, R4 dividing potential drop powers to digital knob switch DS. Now, processor MCU is by level change (turning into VDD3) of the state end A of detection digital knob switch DS, can judge that the controlled plant that current needs regulate has turned into picture brightness, thus the turning direction according to digital knob switch DS, it is achieved to the adjustment step by step of display screen picture brightness.
For the controlled plant of more more number, it is possible to copying Fig. 2 and description above to carry out expansion design, the present embodiment no longer launches explanation at this.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, change, remodeling, interpolation or the replacement that those skilled in the art make in the essential scope of the present invention, also should belong to protection scope of the present invention.
Claims (9)
1. a digital knob switch multiplexing device, it is characterised in that: comprise the power supply of the different amplitude of multichannel, digital knob switch and treater; The power supply of the different amplitude of described multichannel selects a wherein road power supply to be that digital knob switch is powered by gating device, and described treater judges the controlled plant of current selected according to the power supply size of digital knob switch; Wherein,
Described treater connects sense terminal and the state end of numeral twist switch, being selected wherein after a road power supply and before digital knob switch rotates by gating device, treater, by the voltage magnitude of the described sense terminal of detection or state end, judges the controlled plant of current selected.
2. digital knob switch multiplexing device according to claim 1, it is characterised in that: the ADC interface of the state end connection handling device of described digital knob switch, the GPIO mouth of sense terminal connection handling device; Treater judges the controlled plant of current selected by the magnitude of voltage that detection its ADC interface conversion exports, and by detecting the high low level state of GPIO mouth described in it, judges whether digital knob switch rotates.
3. digital knob switch multiplexing device according to claim 2, it is characterized in that: described treater is according to the phase differential between the state end of digital knob switch and sense terminal, judge the turning direction of digital knob switch, and then regulate the parameter value of controlled plant to increase or reduce according to turning direction.
4. digital knob switch multiplexing device according to any one of claim 1 to 3, it is characterized in that: comprise the highest direct supply of a road voltage magnitude at described power supply, all the other each road power supplies generate via the conversion of dividing potential drop circuit dividing potential drop by the direct supply that this road voltage magnitude is the highest.
5. digital knob switch multiplexing device according to claim 4, it is characterised in that: each road power supply generated by the conversion of described dividing potential drop circuit dividing potential drop exports the power supply end of digital knob switch separately to via a road anti-back flow circuit.
6. digital knob switch multiplexing device according to claim 4, it is characterized in that: when described controlled plant is two kinds, described gating device is a keyswitch, and described keyswitch is connected between the highest direct supply of described voltage magnitude and the power supply end of digital knob switch; Described dividing potential drop circuit is connected between the highest direct supply of voltage magnitude and ground, and dividing potential drop node connects the power supply end of described digital knob switch.
7. digital knob switch multiplexing device according to claim 4, it is characterised in that: when described controlled plant is two or more, described gating device is a single pole multiple throw; The public end of described single pole multiple throw connects the highest direct supply of described voltage magnitude, wherein a road gating end directly connects the power supply end of described digital knob switch, each road gating end is each via a component pressure circuit ground in addition, and the dividing potential drop node on each component piezoelectricity road connects the power supply end of described digital knob switch separately; Or described dividing potential drop circuit is the circuit that a road has multiple dividing potential drop node, one end connects the highest direct supply of described voltage magnitude, the other end ground connection, the public end of described single pole multiple throw connects the power supply end of described digital knob switch, each road gating end correspondingly gating connect each dividing potential drop node.
8. digital knob switch multiplexing device according to claim 4, it is characterised in that: the direct supply that described voltage magnitude is the highest passes through filter capacitor ground connection.
9. an electronics, it is characterised in that: it is provided with the digital knob switch multiplexing device as described in claim as any one of claim 1 to 8.
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| CN110231903B (en) * | 2018-03-05 | 2022-05-31 | 斑马智行网络(香港)有限公司 | Parameter adjusting method and device |
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| CN103178866B (en) * | 2013-02-22 | 2015-08-12 | 海能达通信股份有限公司 | A kind of terminal equipment and using method thereof |
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| CN203573130U (en) * | 2013-11-29 | 2014-04-30 | 青岛歌尔声学科技有限公司 | Digital knob switch multiplexing device and electronic equipment using same |
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